Root tabs question... not about plants

This is a discussion on Root tabs question... not about plants within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; -->
I put the root tabs in a few days ago, is it normal for the tab to seep up through the substrate and be ...

I put the root tabs in a few days ago, is it normal for the tab to seep up through the substrate and be visible when looking through the glass? It kind of looks like mold on my sand, not sure if this is normal or not